when we cleanup the window source, we must free all items from the av…

…-sync encode queue

git-svn-id: https://xpra.org/svn/Xpra/trunk@14308 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/server/window/window_video_source.py

@@ -244,6 +244,7 @@ def specinfo(x):
 
     def cleanup(self):
         WindowSource.cleanup(self)
+        self.free_encode_from_queue()
         self.cleanup_codecs()
 
     def cleanup_codecs(self):
@@ -791,6 +792,14 @@ def get_frame_encode_delay(self, options):
             return 0
         return self.av_sync_delay
 
+    def free_encode_from_queue(self):
+        #free all items in the encode queue:
+        eqt = self.encode_from_queue_timer
+        if eqt:
+            self.encode_from_queue_timer = None
+            self.source_remove(eqt)
+        self.call_in_encode_thread(False, self.encode_from_queue)
+
     def schedule_encode_from_queue(self, av_delay):
         #must be called from the UI thread for synchronization
         #we ensure that the timer will fire no later than av_delay